/ ˈrɑːskl; NAmE ˈræskl/ noun
1.
( humorous ) a person, especially a child or man, who shows a lack of respect for other people and enjoys playing tricks on them :
Come here, you little rascal!
2.
( old-fashioned ) a dishonest man
► ras·cal·ly adjective ( old-fashioned )
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WORD ORIGIN
Middle English (in the senses a mob and member of the rabble ): from Old French rascaille rabble, of uncertain origin.